[Form 4] UNITIL CORP Insider Trading Activity

Rhea-AI Filing Summary

Anne L. Alonzo, a director of Unitil Corporation (UTL), reported transactions on 10/01/2025 showing the vesting and settlement of restricted stock units and an associated sale. She was granted 2,435 restricted stock units that are fully vested on grant and payable 70% in common stock and 30% in cash based on the closing price the day before settlement. The filing reports a disposition of 1,276 shares of common stock (code V), and shows 4,017 shares of common stock beneficially owned following the reported transactions. The form is signed by an attorney-in-fact and dated 10/03/2025.

The disclosure is a routine Section 16 Form 4 reporting compensation-related equity (restricted stock units) that vested and the resulting share sale, rather than a corporate event or financial restatement. All figures and mechanics reported here are limited to the grant, its settlement mix (stock/cash), the number of shares sold, and the resulting beneficial ownership.

Positive

• 2,435 restricted stock units are fully vested, aligning director compensation with shareholder value
• RSUs pay 70% in stock and 30% in cash, providing mixed liquidity and equity alignment

Negative

• Disposition of 1,276 shares (code V) reduces insider ownership and may be viewed as insider selling
• Post-transaction direct beneficial ownership is only 4,017 shares, a modest holding level

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Alonzo Anne L.

(Last) (First) (Middle)

6 LIBERTY LANE WEST

(Street)

HAMPTON NH 03842

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
UNITIL CORP [ UTL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common stock, no par value								1,276	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted stock units	(1)	10/01/2025		A		2,435		(1)	(1)	Common stock	2,435	$47.22	4,017	D

Explanation of Responses:

1. Each restricted stock unit is equivalent in value to one share of Unitil Corporation's common stock, no par value ("Common Stock"), and represents the right to receive a combination of cash and Common Stock after separation from service on Unitil Corporation's Board of Directors. Each restricted stock unit is fully vested upon grant and is payable 70% in Common Stock and 30% in cash, based upon the closing price of Common Stock on the day prior to settlement.

	/s/ Sandra L. Whitney, attorney-in-fact for Anne L. Alonzo	10/03/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Anne L. Alonzo report on Form 4 for Unitil (UTL)?

The filing shows the vesting of 2,435 restricted stock units on 10/01/2025, a disposition of 1,276 common shares, and resulting beneficial ownership of 4,017 shares.

How are the restricted stock units payable for the UTL director?

Each RSU is payable 70% in common stock and 30% in cash, based on the closing price the day prior to settlement.

What does transaction code V mean in this Form 4?

In this filing, code V is used for shares associated with the vesting of restricted stock units; the form lists 1,276 shares disposed under that code.

When was the Form 4 signed and filed?

The Form 4 is signed by an attorney-in-fact and dated 10/03/2025.

Did the director purchase any shares in this filing?

No purchase was reported; the filing documents vesting of RSUs and a disposition of 1,276 shares.